Enterprise Rent-A-Car

My son had a CONFIRMED reservation for a rental vehicle (confirmation # SSHPH4) for the weekend of 12 May 2012. On that morning (12th of May) my son called Enterprise rent-a-car at 9:00 am to set-up/coordinate delivery of the rental vehicle. He was told that they were currently busy and would return his call shortly. After waiting a half hour with no call back, another call was made to Enterprise to again set-up/coordinate delivery of the rental vehicle. And again they were "too busy" to coordinate the rental .... but would call back. AN HOUR AND A HALF LATER, again with NO call back, a third call was made to Enterprise in an effort to complete the vehicle rental. And again he was told that they were "busy" and that they would call him back as soon as possible. An hour later the office closed .... NO CALL BACK .... NO VEHICLE .... just blown off.